Improvement in steam-boilers



Patented May16 AMPl/fll'D-UIWOERAPH/C mm. (awn/MES PROCESS) back endwhen the face-plate is on, as shown.

DANIEL SULLIVAN, or BANGOR, MAINE.

Letters Patent No. 114,876, dated May 16,1871.

IMPROVEMENT IN STEAM-BOILERS.

The Schedule referred to in these Letters Patent and making part of thesame.

I, DANIEL SULLIVAN, of Bangor, in thecounty of Penobscot and State'ofMaine, have invented certain Improvements in Steam-Boilers made on theD000- motive Principle or Form, of which the following isaspecification.

The nature and object of my invention are the improvement in theconstruction of steam-boilers on the locomotive principle, by which thedraught is increased. and makes steam more rapidly and with less fuelthan the usual form or make of such boilers, thereby increasing thehorse-power, and by their construction made more durable and withgreater facilities in cleanlngout scale and sediment.

Description of Accompanying Drawing.

Figure 1 is a perspective view of the fire-front of the boiler andsteam-dome, with the face-plate off, and showing the position of thewater-tubes in the water 01' steam-space.

Figure 2 is a side view, showing the arrangement or location of thewater-tubes running the entire length of boiler and through the intenseheat of the fire-box, therebyjncreasing the heating surface one-thirdmore than .in the usual way of constructing locomotiveboilers, showingthe fire-space all around the inner cylinder and around the outside ofthe tubes, instead of throughthem, as made in the common form.

Figure 3 shows the back end of the boiler with the face-plate out of thewater-space, and also the arrangernent of the double cylinder with'asmall Waterspace between outside'and inside cylinders, running the wholelength of the boiler, and also forms a water- General Description. I F,in 1, shows steam-space over topof inner cylinder.

F, in fig. 3, shows the same on the back end of the boiler. G G showwater-spaces between both cylinders.

A, in fig.- 2, shows steam-space and steam-dome on top of boiler. I

B .B B show water-space on front, back, sides, and between cylinders.

B" B show water-space in legs of boilers,

O. G O 0 show water-tubes.

D D show top and bottom of innercylinders.

O 0 0 show fire-spacebetween tubes.

. P P show front and back water-plates, forming. water-spaces B B, andare taken off and put on as oocasion requires. Gis the smoke-outlet orchimney."

I claim asmy inventiou The within-described arrangement, in asteam-boiler, of the straight water-tubes, running the entire length of theboiler and through the intense heat of the fire,

the double cylinders forming the water-space, as de-' scribed, the broadremovablefront and back plates, and the smoke-stack, riveted to theinner and outer cylinder, all arranged with reference to each other, asherein set forth, for the purposes specified.

. DANIEL SULLIVAN.

Witnesses G. W. GORHAM, E. N. EGERY.

